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| Anyone wanna help me troubleshoot my Simasimac Reloaded SE/30 board? |
Posted by: smrieck511 on 2026-05-06 16:44:12
KNOWN SO FAR
CPU - Working Correctly (Swapped from good board)
ROM SIMM - Working Correctly (Swapped from good board)
RAM SIMMS - Working Correctly (Swapped from good board)
VIDEO ROM - Working Correctly (Swapped from good board)
VIDEO PALS - Working Correctly (Swapped from good board)
VIDEO RAM - Working Correctly (Swapped from good board)
RAM Diodes - Corrected and Tested (one of Colin's boards)
New FPU
New CAPS
RESET Switch functioning correctly
RESET Circuit intact an operating correctly
NMI Switch has NO effect but is mechanically ok
GLUE Chip Continuity - All pins checked and ok
All Clock signals are present and correct.
I am NOT getting square waves on the ROM Adnress lines (Not walking)
UNKNOWN
All Address Line Continuity (Checking this next)
All Data Line Continuity (Checking this next)
Possibly damaged GLUE Chip - Pulled from bombed board
Damaged ASC or UB11 ? No sound at all
OTHER
Have a nice mildly bombed IICX board on the way for parts
Thanks for any thoughts! |
Posted by: smrieck511 on 2026-05-06 16:46:52
Also no bridges. |
Posted by: croissantking on 2026-05-06 16:55:23
Check UH7 again as that is notoriously difficult to fit on a Reloaded board. |
Posted by: smrieck511 on 2026-05-06 16:56:36
Check UH7 again as that is notoriously difficult to fit on a Reloaded board. Agreed. Thanks. |
Posted by: finkmac on 2026-05-06 16:57:57
Damaged ASC or UB11 ? No sound at all what do you mean by that?
if you're not getting ROM activity you won't get a chime... but, you should hear something of a pop if you're listening with headfones
imo beep out all the address lines and data lines. yeah it sucks. you gotta do it though.
and double check for bridges on all PLCCs |
Posted by: smrieck511 on 2026-05-06 17:02:18
what do you mean by that?
if you're not getting ROM activity you won't get a chime... but, you should hear something of a pop if you're listening with headfones
imo beep out all the address lines and data lines. yeah it sucks. you gotta do it though.
and double check for bridges on all PLCCs Oh yeah sorry I do get a pop but thats it. |
Posted by: smrieck511 on 2026-05-08 16:54:30
Just went through every single pin for every single address and data line per the schematic redraw matrixes.... exhausting.
Everything checks ok. |
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